<?php

namespace app\common\lib;

/**
 * 时间
 * @by singwa
 * Class Aes
 * @package app\common\lib
 */
class Time
{
    /**
     * 产生13位字符串
     * @return string
     */
    public static function get13TimeStamp()
    {

        $str = microtime();
        list($t1, $t2) = explode(' ', $str);

        return $t2 . ceil($t1 * 1000);
    }
}